Larchet was primarily a composer of miniatures and an arranger of Irish folksongs for classical ensembles. His arrangement (in 1954) of the Irish national anthem is the official version still in use today.[3]

His daughter, Sheila Larchet Cuthbert (b. 1923), is an Irish harpist and author.[4] She published The Irish Harp Book: A Tutor and Companion (Dublin, 1975; 5/2004).

^Axel Klein: Irish Classical Recordings: A Discography of Irish Art Music (Westport, CT, 2001), p. 100: "John F. Larchet (* Dublin 1884, t Dublin 1967). John Francis Larchet built the bridge between the 19th and the 20th century in Irish music. [...] However, Larchet is best remembered for his teaching."

^Nora Joan Clark: The Story of the Irish Harp: Its History and Influence (Lynnwood, WA: North Creek Press, 2003), p. 126: "Sheila's father, Dr. John F. Larchet, composer and conductor, was Director of Music at the Abbey Theatre during its heyday, from 1907 to 1934. Sheila Larchet began her harp studies with Mother Alphonsus O'Connor ...".